diff --git a/eventing/samples/gcp-pubsub-source/subscriber.yaml b/eventing/samples/gcp-pubsub-source/subscriber.yaml
index e7a990f22..2a0885659 100644
--- a/eventing/samples/gcp-pubsub-source/subscriber.yaml
+++ b/eventing/samples/gcp-pubsub-source/subscriber.yaml
@@ -6,12 +6,12 @@ metadata:
   name: gcppubsub-source-sample
   namespace: default
 spec:
-  from:
+  channel:
     apiVersion: eventing.knative.dev/v1alpha1
     kind: Channel
     name: qux-1
-  call:
-    targetRef:
+  subscriber:
+    ref:
       apiVersion: serving.knative.dev/v1alpha1
       kind: Service
       name: message-dumper